CN102002481A - Production method of porcine reproductive and respiratory syndrome virus - Google Patents
Production method of porcine reproductive and respiratory syndrome virus Download PDFInfo
- Publication number
- CN102002481A CN102002481A CN 201010577372 CN201010577372A CN102002481A CN 102002481 A CN102002481 A CN 102002481A CN 201010577372 CN201010577372 CN 201010577372 CN 201010577372 A CN201010577372 A CN 201010577372A CN 102002481 A CN102002481 A CN 102002481A
- Authority
- CN
- China
- Prior art keywords
- cell
- microcarrier
- reactor
- bio
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The invention discloses a production process of a porcine reproductive and respiratory syndrome virus (PRRSV) by using a bioreactor to culture a Marc-145 cell, which comprises the following technical steps of: (1) selecting a Marc-145 cell as a vaccine preparation cell; (2) culturing the vaccine preparation cell through passage and amplification; (3) reproducing seed virus for production; (4) culturing the microcarrier of the Marc-145 cell in the bioreactor; (5) producing an antigen of the PRRSV; and (6) treating the harvested virus antigen liquid. The invention can greatly reduce production cost and increase the input-output ratio by 5-10 times. Moreover, the invention has the advantages of short production period, small occupied land, easy and rapid expansion of production scale, less environment pollution, easy treatment, high automation degree, fewer people and easy realization of balanced and stable quality. The production cost can be obviously increased, and the yield and the quality of the vaccine can be increased.
Description
Technical field
The present invention relates to a kind of applying biological reactor microcarrier cell culture technology and produce the method for vaccine, can be used for the suitability for industrialized production pig and breathe and the breeding difficulty syndrome vaccine, substitute traditional rolling bottle culture method production technique.
Background technology
At present, domestic pig breathes with the production of breeding difficulty syndrome vaccine and mainly relies on " cell rolling bottle culture method " to realize.This traditional technology labour intensity is big, and length consuming time, efficient are low, the production cost height; Easily by environmental pollution; Between different production batchs or the difference between the different bottles of same production batch big; Be difficult to enlarge and produce; The vaccine quality hidden danger that caused by bacterium or other virus pollution occurs easily, relate to Biosafety and public health problem.
Summary of the invention
The objective of the invention is to overcome the weak point that existing " cell rolling bottle culture method " exists, provide a kind of applying biological reactor microcarrier cell cultures to produce the method for pig breathing and breeding difficulty syndrome vaccine.This method can reduce production costs in a large number, and with short production cycle, and occupied ground is little, is easy to expand the scale of production fast, and is low in the pollution of the environment and be easy to handle, the level of automation height, and personnel selection is few, and quality is easy to realize equalization stable.Can significantly improve vaccine output and quality.
For achieving the above object, the present invention has taked following technical scheme:
One boar breathes the production method with the breeding difficulty syndrome virus, comprises the steps:
(1) seedling going down to posterity and cultivating with cell
Get the production of covering with individual layer Marc-145 cell, through trysinization liquid had digestive transfer culture, cultivate with cell growth medium, culture temperature is 35～38 ℃; When forming good cell monolayer, being used for continuing to go down to posterity or being inoculated in bio-reactor and carrying out microcarrier and cultivate.
(2) breeding of cell seed culture of viruses:
Use cell maintenance medium, pig breathing and the good cell monolayer that the breeding difficulty syndrome virus basis malicious ratio of per-cent 0.5～5% by volume of kind is inoculated into step (1) formation are continued to cultivate, gather in the crops viral liquid during to cell 70～80% pathologies; Again with this viral liquid as kind of a poison, on cell, carry out cell continuous passage rejuvenation, the product that at every turn goes down to posterity carries out viral TCID
50With aseptic detection, reach viral TCID
50Stable and reach 10
7.0TCID
50Stop rejuvenation when/mL is above, as producing kind of a poison.
(3) microcarrier of Marc-145 cell in bio-reactor cultivated:
Bio-reactor is pressed 30%～80% of cumulative volume and is added aseptic cell growth medium, and add microcarrier by 3～15g/L concentration in every liter of aseptic cell growth medium, start bio-reactor, the slow speed of revolution was stirred after 30 minutes, get well-grown Marc-145 cell on step (1) rolling bottle, be prepared as cell suspension through the digestion of trysinization liquid, press 1 * 10 after the cell counting
5Individual/mL～5 * 10
5The density of individual/mL is inoculated in the reactor, sets culture parameters such as suitable temperature, pH, stirring velocity, dissolved oxygen, carries out reactor and controls cultivation automatically.
(4) breeding of seedling venom:
Wait to observe that cell covers with 80%～90% on the microcarrier, empty ball rate is lower than 5%, and full ball rate is greater than 80%, and cell state is good, and the cell density count results reaches 3 * 10
6Individual/mL～5 * 10
6Individual/as to connect poison more than the mL to operate, by volume the ratio of per-cent 0.5～5% inserts the pig breathing and breeding difficulty syndrome virus seed culture of viruses poison that step (2) prepares, set culture parameters such as suitable temperature, pH, stirring velocity, dissolved oxygen content, carry out reactor to control cultivation automatically; By volume the ratio of per-cent 0.5～5% inserts pig breathing and breeding difficulty syndrome virus seed culture of viruses venom, get microcarrier in the reactor at regular intervals after connecing poison, with microscope observing cell pathology situation, wait to observe that cell substantially all comes off on the microcarrier, and the DO value is obvious ascendant trend, stir to 80%～100% o'clock stopped reaction device, treat that microcarrier all sinks to reactor bottom after, results supernatant liquor and microcarrier.
(5) processing of the viral liquid of results:
The viral liquid of results and microcarrier are after 2～3 freeze thawing, and-20 ℃ of freezing preservations were standby after cell debris was removed in centrifugal or filtration.
Parameters such as in the technique scheme, bio-reactor is can A.T.C, pH, dissolved oxygen, stirring velocity are applicable to the bio-reactor that microcarrier is cultivated, and volume is 3L～3000L.
In the technique scheme, microcarrier is a Cytodex series microcarrier, and microcarrier need clean before use, sterilize, and method is as follows: 1) soak microcarrier more than three hours with PBS; 2) clean microcarrier 3 times with PBS; 3) soak microcarrier with PBS, 121 ℃ of steam sterilizings 30 minutes.
In the technique scheme, the trysinization liquid formula is: mass percent is 0.25% pancreatin (specification is 1: 250); The cell growth medium prescription is: volumn concentration is respectively 90%～92%DMEM liquid, 8%～10% bovine serum, adds an amount of two anti-(penicillin and Streptomycin sulphate mixed solution), makes two anti-concentration be no more than 500IU/ml, and adjusting pH is 6.8～7.6.
In the technique scheme, planting malicious inoculum size is mass percent 0.5～5%, the cell maintenance medium prescription that uses during virus culture is: volumn concentration is DMEM liquid, the adding of serum 1～4% an amount of two anti-(penicillin and Streptomycin sulphate mixed solutions), make two anti-concentration be no more than 500IU/ml, pH is adjusted into 7.2～7.8.Culture temperature is 33～38 ℃.
In the technique scheme, the bio-reactor setup parameter is: 33～38 ℃ of culture temperature, pH7.2～7.8, dissolved oxygen 30%～70%, mixing speed 30～50rpm.
Compared with prior art, the present invention has following beneficial effect:
(1) making pig with " bio-reactor microcarrier cell suspension culture technology " replacement " rolling bottle cell culture technology " breathes and the breeding difficulty syndrome vaccine, can solve that production efficiency is low, unstable product quality, problem that virus titer is low, change by production technology and production technique, promote vaccine quality and output, the security that improves vaccine comprehensively.
(2) the present invention can reduce production costs in a large number, and with short production cycle, and each production cycle only needs 4～5 days, compares obviously shortening more than 6～7 days of existing rolling bottle cell culture method.
(3) the applying biological reactor carries out production of vaccine, has the level of automation height, and personnel selection is few, the production technique simple and stable.The big occupied ground of easy to operate, output is little, is easy to expand the scale of production fast.Quality is easy to realize equalization stable.
(4) use present method and produce vaccine, the product virus titer improves 10～20 times than traditional rolling bottle cell culture method, and cost reduces by 3～4 times.The quality product homogeneous is easy to large-scale production, other biological safety and public health problem that entire production process does not relate to conventional production methods and had.
Description of drawings
Fig. 1 is preparation flow figure of the present invention
Embodiment
The invention will be further described below in conjunction with Figure of description and specific embodiment.
(1) selects the means of bio-reactor: the 75L bio-reactor as cultivation.
(2) select microcarrier to attach the carrier of growth as cell: Cytodex-1 series microcarrier.
(3) cleaning of microcarrier, sterilising method: 1) weighing Cytodex-1 microcarrier 5g/L, an amount of PBS liquid of use soaked three hours.2) clean 3 times with an amount of PBS liquid at every turn.3) add an amount of PBS liquid and soak microcarrier, 121 ℃ of steam sterilizings 30 minutes.
(4) select the Marc-145 cell as the seedling cell:
(5) seedling going down to posterity and cultivating with cell: above-mentioned cell is through trysinization liquid had digestive transfer culture, with benzylpenicillin sodium and the Vetstrep mixed solution that contains 92%DMEM liquid, 8% calf serum, 200IU/ml, pH is adjusted into 7.2 cell growth medium continuation cultivation, and culture temperature is 37 ℃.When forming good individual layer, being used for continuing to go down to posterity or being inoculated in bio-reactor and carrying out microcarrier and cultivate.
(6) breeding of cell seed culture of viruses: use cell maintenance medium, pig breathes with breeding difficulty syndrome virus seed culture of viruses poison and inoculates well-grown above-mentioned cell monolayer in 1% ratio in the future, continues to cultivate, and culture temperature is 37 ℃.Gather in the crops viral liquid during to cell 80% above pathology; Measure the TCID of virus
50, treat that virus titer is stable and reach 10
7.0TCID
50Stop rejuvenation when/mL is above, should virus use kind of a poison as producing.
(7) microcarrier of Marc-145 cell in bio-reactor cultivated: get well-grown Marc-145 cell on the rolling bottle, being prepared as cell suspension through the digestion of trysinization liquid, after the cell counting in the reaction of inoculation device.Bio-reactor is set as follows 37 ℃ of parameters of temperature, pH 7.2, stirring velocity 50rpm, dissolved oxygen content 50% to carry out reactor and controls cultivation automatically.
(8) breeding of seedling venom: cultivate the back and waited to observe on the 3rd that cell covers with substantially on the microcarrier, and the cell counting result reaches 3.5 * 10
6Connect the poison operation when/ml is above.Culture parameters such as 37 ℃ of design temperatures, pH7.2, stirring velocity 50rpm, dissolved oxygen content 50% are carried out reactor and are controlled cultivation automatically.Connect the poison back and got microcarrier in the reactor every 2 hours, with microscope observing cell pathology situation, and the TCID of test sample
50Wait to observe that cell substantially all comes off on the microcarrier, and the DO value is obvious ascendant trend, stirs to 80%～100% o'clock stopped reaction device, treat that microcarrier all sinks to reactor bottom after, gather in the crops supernatant liquor and microcarrier respectively.
Gather in the crops the processing of viral liquid :-20 ℃ of freezing preservations are as work in-process after cell debris is removed in centrifugal behind time multigelation or filtration.
(9) inspection of semifinished product and vaccine manufacturing, inspection after construction
9.1 gather in the crops the mensuration of viral liquid poison valency:
The supernatant liquor and the microcarrier precipitation of above results are mixed back sampling freeze thawing 3 times, measure malicious valency.Viral level answers 〉=10
7.0TCID
50/ ml.
9.2 the inspection of semifinished product
Steriling test: carry out asepsis growth for 301 pages by " People's Republic of China's veterinary biologics quality standard " appendix.
(10) vaccine manufacturing and inspection after construction are undertaken by " pig breathes with breeding difficulty syndrome living vaccine and makes and inspection procedure " requirement.
Claims (6)
1. a boar breathes the production method with the breeding difficulty syndrome virus, it is characterized in that:
With bio-reactor as the cultivation instrument; With the growing carrier of microcarrier as the cell attaching; With the Marc-145 cell as the seedling cell;
And comprise the steps:
(1) seedling going down to posterity and cultivating with cell
Get the Marc-145 cell that covers with individual layer, through trysinization liquid had digestive transfer culture, cultivate with cell growth medium, culture temperature is 35～38 ℃; When forming good cell monolayer, being used for continuing to go down to posterity or being inoculated in bio-reactor and carrying out microcarrier and cultivate;
(2) breeding of cell kind poison
With cell maintenance medium pig breathing and the good cell monolayer that the breeding difficulty syndrome virus basis malicious ratio of per-cent 0.5～5% by volume of kind is inoculated into step (1) formation are continued to cultivate, gather in the crops viral liquid during to cell 70～80% pathologies; Again with this viral liquid as kind of a poison, on cell, carry out cell continuous passage rejuvenation, the product that at every turn goes down to posterity carries out viral TCID
50With aseptic detection, reach viral TCID
50Stable and reach 10
7.0TCID
50Stop rejuvenation when/mL is above, as producing kind of a poison;
(3) microcarrier of Marc-145 cell in bio-reactor cultivated
Bio-reactor is pressed 30%～80% of cumulative volume and is added aseptic cell growth medium, start bio-reactor, get the well-grown Marc-145 cell of step (1) behind the stirring at low speed 30min, be prepared as cell suspension, press 1 * 10 after the cell counting through the digestion of trysinization liquid
6Individual/mL～5 * 10
6The density of individual/mL is inoculated in the reactor, sets the culture parameters of suitable temperature, pH, stirring velocity, dissolved oxygen content, carries out reactor and controls cultivation automatically;
(4) breeding of seedling venom
Wait to observe that cell covers with 80%～90% on the microcarrier, empty ball rate is lower than 5%, and full ball rate is greater than 80%, and cell state is good, and the cell counting result reaches 3 * 10
6Individual/mL～5 * 10
6Individual/as to connect poison more than the mL to operate, get involved the pig breathing and breeding difficulty syndrome virus production kind poison that step (2) prepares in 0.5～5% ratio, set the culture parameters of suitable temperature, pH, stirring velocity, dissolved oxygen, carry out reactor and control cultivation automatically; Get microcarrier in the reactor at regular intervals after connecing poison, with microscope observing cell pathology situation, and the TCID of test sample
50Wait to observe that cell substantially all comes off on the microcarrier, and the DO value obviously rises to 80%～100%, the stopped reaction device stirs, treat that microcarrier all sinks to reactor bottom after, results supernatant liquor and microcarrier;
(5) processing of the viral liquid of results
Virus liquid and microcarrier are after 2～3 freeze thawing, and-20 ℃ of freezing preservations were viral liquid after cell debris was removed in centrifugal or filtration.
2. pig according to claim 1 breathes the production method with the breeding difficulty syndrome virus, it is characterized in that: the bio-reactor of employing for can A.T.C, pH, dissolved oxygen and stirring velocity, be applicable to the bio-reactor that microcarrier is cultivated, volume is 3L～3000L.
3. pig according to claim 1 breathes the production method with the breeding difficulty syndrome virus, it is characterized in that: described microcarrier is a Cytodex series microcarrier, microcarrier need clean before use, sterilize, and method is as follows: 1) soak microcarrier more than three hours with PBS; 2) clean microcarrier 3 times with PBS; 3) soak microcarrier with PBS, 121 ℃ of steam sterilizings 30 minutes.
4. pig according to claim 1 breathes the production method with the breeding difficulty syndrome virus, and it is characterized in that: described trysinization liquid formula is: mass percent is 0.25% pancreatin; The cell growth medium prescription is: volumn concentration is respectively that 90%～92% DMEM liquid, 8%～10% bovine serum, adding are no more than the two anti-of 500IU/ml, and adjusting pH is 6.8～7.6.
5. pig according to claim 1 breathes the production method with the breeding difficulty syndrome virus, it is characterized in that: the malicious inoculum size of described kind is a volume percent 0.5～5%, the cell maintenance medium prescription that uses during virus culture is: the DMEM liquid, the adding that contain serum 1～4% are no more than the two anti-of 500IU/ml, and pH is adjusted into 7.2～7.8; Culture temperature is 33～38 ℃.
6. pig according to claim 1 breathes the production method with the breeding difficulty syndrome virus, and it is characterized in that: described bio-reactor setup parameter is: 33～38 ℃ of culture temperature, pH 7.20～7.80, dissolved oxygen 30%～70%, mixing speed 30～50rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105773722A CN102002481B (en) | 2010-12-08 | 2010-12-08 | Production method of porcine reproductive and respiratory syndrome virus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105773722A CN102002481B (en) | 2010-12-08 | 2010-12-08 | Production method of porcine reproductive and respiratory syndrome virus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102002481A true CN102002481A (en) | 2011-04-06 |
| CN102002481B CN102002481B (en) | 2012-07-18 |
Family
ID=43810184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105773722A Active CN102002481B (en) | 2010-12-08 | 2010-12-08 | Production method of porcine reproductive and respiratory syndrome virus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102002481B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206614A (en) * | 2011-05-05 | 2011-10-05 | 新疆天康畜牧生物技术股份有限公司 | Novel method for preparing mixed glue solution for purifying virus plaques and cloning viruses |
| CN103555674A (en) * | 2013-11-01 | 2014-02-05 | 乔自林 | Multiple-virus-obtaining process for proliferating porcine reproductive and respiratory syndrome virus by Marc (rhesus monkey kidney cell)-145 cell cultured by microcarriers |
| CN104593335A (en) * | 2015-03-05 | 2015-05-06 | 成都天邦生物制品有限公司 | Method for producing propagation and respiratory tract syndrome CH-1R strain viruses for pigs by seroculturing Marc-145 cells |
| CN111454882A (en) * | 2020-04-15 | 2020-07-28 | 杭州佑本动物疫苗有限公司 | Process for producing blue ear virus by culturing Marc-145 cells by microcarrier |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966157B (en) * | 2013-02-05 | 2016-05-25 | 普莱柯生物工程股份有限公司 | Cell line and application thereof for pig breeding with respiratory system syndrome Virus culture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607082A (en) * | 2008-06-18 | 2009-12-23 | 洛阳普莱柯生物工程有限公司 | A kind of preparation method of Porcine reproductive and respiratory syndrome inactivated vaccine |
| CN101748102A (en) * | 2010-02-01 | 2010-06-23 | 成都天邦生物制品有限公司 | Method for production of porcine epidemic diarrhea virus |
-
2010
- 2010-12-08 CN CN2010105773722A patent/CN102002481B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607082A (en) * | 2008-06-18 | 2009-12-23 | 洛阳普莱柯生物工程有限公司 | A kind of preparation method of Porcine reproductive and respiratory syndrome inactivated vaccine |
| CN101748102A (en) * | 2010-02-01 | 2010-06-23 | 成都天邦生物制品有限公司 | Method for production of porcine epidemic diarrhea virus |
Non-Patent Citations (1)
| Title |
|---|
| 《中国畜软兽医学会善医公共卫生学分会第一次学术研讨会论丈集》 20081231 孔留五，等 一株猪繁殖与呼吸障碍综合症病毒缺失变异株的分离及鉴定 360-364 1－5 , * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206614A (en) * | 2011-05-05 | 2011-10-05 | 新疆天康畜牧生物技术股份有限公司 | Novel method for preparing mixed glue solution for purifying virus plaques and cloning viruses |
| CN103555674A (en) * | 2013-11-01 | 2014-02-05 | 乔自林 | Multiple-virus-obtaining process for proliferating porcine reproductive and respiratory syndrome virus by Marc (rhesus monkey kidney cell)-145 cell cultured by microcarriers |
| CN104593335A (en) * | 2015-03-05 | 2015-05-06 | 成都天邦生物制品有限公司 | Method for producing propagation and respiratory tract syndrome CH-1R strain viruses for pigs by seroculturing Marc-145 cells |
| CN104593335B (en) * | 2015-03-05 | 2017-10-03 | 成都天邦生物制品有限公司 | The low cells of serum free culture system Marc 145 production pig breeding and the method for respiratory syndrome CH 1R strain virus |
| CN111454882A (en) * | 2020-04-15 | 2020-07-28 | 杭州佑本动物疫苗有限公司 | Process for producing blue ear virus by culturing Marc-145 cells by microcarrier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102002481B (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101748102B (en) | Method for production of porcine epidemic diarrhea virus | |
| CN101979518B (en) | Method for preparing pseudorabies virus | |
| CN102091329B (en) | Preparation method of inactivated porcine parvovirus vaccine and product thereof | |
| CN102178946B (en) | Application of baby hamster kidney(BHK)-21 cell serum-free suspension culture technology in foot-and-mouth disease vaccine production | |
| CN106047821B (en) | A method of utilizing bioreactor large-scale production Rotavirus Vaccine | |
| CN102002481B (en) | Production method of porcine reproductive and respiratory syndrome virus | |
| CN103550771A (en) | Production method of transmissible gastroenteritis virus vaccine | |
| CN105969737B (en) | A kind of method of large-scale production Rotavirus Vaccine | |
| CN101289655B (en) | Process for preparing porcine circovirus | |
| CN103087995B (en) | Method of preparing foot-and-mouth disease vaccine by using BHK-21 adherent cells | |
| CN104027798B (en) | Method for culturing and producing PVC 2 antigen through whole suspension cells | |
| CN103773741A (en) | Method for preparing influenza vaccine by using cage type ventilating and stirring bioreactor | |
| CN102660510B (en) | A kind of method utilizing bio-reactor to produce transmissible gastro-enteritis virus | |
| CN103520715B (en) | Method for producing porcine circovirus II type inactivated vaccine by utilizing WAVE bioreactor | |
| CN101775374B (en) | Production method of porcine epidemic diarrhea virus | |
| CN104004720A (en) | Method for producing porcine circovirus type 2 antigens in large scale with high density | |
| CN102002482B (en) | Method for producing PRRS (Porcine Reproductive and Respiratory Syndrome) viruses | |
| CN102038946A (en) | Method for industrially producing pseudorabies vaccine by using bioreactor | |
| CN103550772B (en) | Production method of pseudorabies virus vaccine | |
| CN105838683A (en) | Method for proliferation of mink canine distemper virus by applying novel cell microcarrier | |
| CN103861097A (en) | Method for preparing porcine epizootic diarrhea inactivated vaccines and product thereof | |
| CN103555674A (en) | Multiple-virus-obtaining process for proliferating porcine reproductive and respiratory syndrome virus by Marc (rhesus monkey kidney cell)-145 cell cultured by microcarriers | |
| CN102727878A (en) | Preparation method of porcine reproductive and respiratory syndrome inactivated vaccine (NVDC-JXA1 strain) by bioreactor and application thereof | |
| CN102038945A (en) | Method for industrially producing swine parvovirus vaccine by utilizing bioreactor | |
| CN104593335B (en) | The low cells of serum free culture system Marc 145 production pig breeding and the method for respiratory syndrome CH 1R strain virus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.358, lingchi street, Chengdu Economic and Technological Development Zone, Sichuan 610000 Patentee after: Chengdu Shiji biopharmaceutical Co.,Ltd. Address before: 610000 No. 358, lingchi street, Longquanyi economic and Technological Development Zone, Chengdu, Sichuan Patentee before: CHENGDU TECBOND BIOLOGICAL PRODUCTS CO.,LTD. |
|
| CP03 | Change of name, title or address |